zinc in tetrahydrofuran 1.5 h; Inert atmosphereReflux;

1: zinc With .alpha.-butylene bromide in tetrahydrofuran 0.0833333 h; Heating / reflux; 2: 2-bromo-1,3-thiazole With chloro-trimethyl-silane in tetrahydrofuran T=50°C; 1 h;

tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran T=70°C; Negishi coupling; 12 h;